SMA Solar Technology AG Electrical Connection
Technical Description SI5048-TB-TEN110340 41
6.4.2 Battery Current Sensor
In addition to the internal measurement, the Sunny Island provides the possibility to measure the
battery current via a shunt. You need this function if you intend to operate additional DC generators
and DC loads in your off-grid system. Only one battery current sensor connected to the respective
master is required for a cluster.
NOTICE!
Connecting additional DC generators or DC loads in the off-grid system damages
the battery.
In this operating case, the Sunny Island does not measure internal power accurately and
the battery's charge state is not precisely determined.
• Install an external battery current sensor (shunt).
Example:
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